Some books are meant to tickle the surface, bring about a smile, a chuckle, a frown, a tear. Others to nail you to a spot while engaging your mind in an exhilarating, breath-taking, mind-numbing adventure. Still others are meant to penetrate the depths of the mind and launch the reader into a soul-searching metaphysical conversation with the universe. Finally, there are the books that drag you out of your complacent lifestyle and launch you into the strange and frightening world where you can only succeed if you survive, and you only survive if you dare to take a step into the unknown. 

They each have a different effect on you. What does not affect you in some meaningful way is what you discard, sometimes after the first few pages.